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Type: Multiple-Choice
Category: Atomic Structure
Level: Grade 11
Author: jbrown5869
Last Modified: 2 months ago

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Atomic Structure Question

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Grade 11 Atomic Structure

An atom's mass number mathematically equals
  1. the total number of protons plus neutrons.
  2. the total number of protons.
  3. the total number of neutrons.
  4. the total number of protons plus electrons.
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